Data Warehousing

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Data Warehousing
Virtual University of Pakistan

• Lecture-30
• What can Data Mining do?

Ahsan Abdullah Assoc. Prof. Head Center for
Agro-Informatics Research www.nu.edu.pk/cairindex.
asp National University of Computers Emerging
Sciences, Islamabad Email ahsan101_at_yahoo.com
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CLASSIFICATION
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ESTIMATION
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PREDICTION
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MARKET BASKET ANALYSIS
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MARKET BASKET ANALYSIS
A
Y
B
98 of people who purchased items A and B also
purchased item C
Ask graphics to replace pictures of items with
similar pictures
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Discovering Association Rules
Items
TID
Bread, Cola, Milk
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Juice, Bread
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Juice, Cola, Diaper, Milk
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Juice, Bread, Diaper, Milk
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Cola, Diaper, Milk
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Rules Milk ? Cola Diaper, Milk ?
Juice
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CLUSTERING

• Task of segmenting a heterogeneous population
  into a number of more homogenous sub-groups or
  clusters.

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Examples of Clustering Applications

• Marketing
• Insurance
• Land use
• Seismic studies

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Ambiguity in Clustering
Two clusters Four clusters Six clusters
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DESCRIPTION
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Comparing Methods

• Accuracy
• Speed
• Robustness
• Scalability
• Interpretability
• Simplicity

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Where does Data Mining fits in?
Data Mining is one step of Knowledge Discovery in
Databases (KDD)
Data